Sidelink configuration in dual connectivity

Abstract

A wireless device (12A) receives a sidelink configuration from each of multiple network nodes (20A, 20B) serving the wireless device (12A). The wireless device (12A) selects, from the received sidelink configurations, a sidelink configuration (16A) that is consistent or compatible with a sidelink configuration (16B) of another wireless device (12B) with which the wireless device (12A) is to communicate over a sidelink. The wireless device (12A) in some embodiments transmits, to each of one or more of the network nodes (20A, 20B) serving the wireless device (12A), an indication of the selected sidelink configuration (16A).

What is claimed is: 
     
         1 . A method performed by a first wireless device, the method comprising:
 receiving a sidelink configuration from each of multiple network nodes serving the first wireless device;   selecting, from the received sidelink configurations, a sidelink configuration that is consistent or compatible with a sidelink configuration of a second wireless device with which the first wireless device is to communicate over a sidelink, wherein the selected sidelink configuration is selected based on a determination that the selected sidelink configuration is consistent or compatible with the sidelink configuration of the second wireless device; and   transmitting, to each of one or more of the network nodes serving the first wireless device, an indication of the selected sidelink configuration;   wherein a sidelink configuration comprises a Radio Link Control (RLC) mode configuration comprising configuration of RLC unacknowledged mode or RLC acknowledged mode;   wherein said selecting comprises selecting, from the received sidelink configurations, a sidelink configuration that comprises the same RLC mode configuration as an RLC mode configuration of the sidelink configuration of the second wireless device with which the first wireless device is to communicate over the sidelink, wherein the selected sidelink configuration is selected based on the selected sidelink configuration comprising the same RLC mode configuration as the RLC mode configuration of the sidelink configuration of the second wireless device with which the first wireless device is to communicate over the sidelink.   
     
     
         2 . The method of  claim 1 , wherein a sidelink configuration further comprises a Logical Channel ID to RLC mode mapping, and wherein said selecting comprises selecting, from the received sidelink configurations, a sidelink configuration that further comprises the same Logical Channel ID to RLC mode mapping as a Logical Channel ID to RLC mode mapping of the sidelink configuration of the second wireless device with which the first wireless device is to communicate over the sidelink, wherein the selected sidelink configuration is selected further based on the selected sidelink configuration comprising the same Logical Channel ID to RLC mode mapping as the Logical Channel ID to RLC mode mapping of the sidelink configuration of the second wireless device with which the first wireless device is to communicate over the sidelink. 
     
     
         3 . The method of  claim 1 , wherein a sidelink configuration further comprises at least one of any one or more of:
 sidelink radio bearer configuration;   quality of service flow to sidelink radio bearer mapping;   configuration of a resource pool for sidelink communication;   Logical Channel ID to RLC mode mapping; and   default sidelink configuration parameters.   
     
     
         4 . The method of  claim 1 , wherein at least one of the network nodes acts as a master node for multi-connectivity operation, and at least one other of the network nodes acts as a secondary node for said multi-connectivity operation. 
     
     
         5 . The method of  claim 1 , further comprising requesting a sidelink configuration from each of the multiple network nodes. 
     
     
         6 . The method of  claim 1 , further comprising receiving, from each of one or more of the network nodes serving the first wireless device, information identifying one or more other wireless devices to which the network node has sent the same sidelink configuration received from that network node. 
     
     
         7 . A first wireless device comprising:
 communication circuitry; and   processing circuitry configured to:
 receive a sidelink configuration from each of multiple network nodes serving the first wireless device; and 
 select, from the received sidelink configurations, a sidelink configuration that is consistent or compatible with a sidelink configuration of a second wireless device with which the first wireless device is to communicate over a sidelink, wherein the selected sidelink configuration is selected based on a determination that the selected sidelink configuration is consistent or compatible with the sidelink configuration of the second wireless device; and 
   transmit, to each of one or more of the network nodes serving the first wireless device, an indication of the selected sidelink configuration;   wherein a sidelink configuration comprises a Radio Link Control (RLC) mode configuration comprising configuration of RLC unacknowledged mode or RLC acknowledged mode;   wherein the processing circuitry is configured to select, from the received sidelink configurations, a sidelink configuration that comprises the same RLC mode configuration as an RLC mode configuration of the sidelink configuration of the second wireless device with which the first wireless device is to communicate over the sidelink, wherein the selected sidelink configuration is selected based on the selected sidelink configuration comprising the same RLC mode configuration as the RLC mode configuration of the sidelink configuration of the second wireless device with which the first wireless device is to communicate over the sidelink.